After the most recent update to 1.40, I started to notice that it took a lot more bullets to kill AI in missions, even with headshots.
I loaded up Virtual Arsenal and fired an unsuppressed 6.5mm MX rifle right into an AI's face. To my surprise, it now takes 2 HEADSHOTS to kill. The first puts the AI at around around 15% health. I fired the PO7 pistol and it takes 3 headshots to kill. None of the AI were wearing head armor of any kind.
Not an expert on ballistics, but this is all very immersion-breaking. Could someone please explain why such damage model is the case?